Declarations;
Ethics approval and consent to participate : Ethical
approval for the use of these animals was granted by the Animal Care and
Use, Research Ethics Committee (ACUREC), University of Ibadan, Nigeria,
ethical code number UIACUREC/17/0023.
Consent for publication : Not Applicable
Data Accessibility statement : The datasets used and/or
analyzed during the current study will be deposited in Dryad and
Figshare upon acceptance for publication.
Competing interests : There are no competing interests
Funding statements – This research did not receive
any grant from funding agencies in the public, commercial, or
not-for-profit sectors.
Authors’ contributions : SOM conceptualized, wrote and
analyzed result of this manuscript, IOO donated the specimen used for
the study, AA proofread and contributed some of the skull samples from
another location.
Acknowledgments – The authors acknowledge the
technical staff and the curators of the skull museums in the Departments
of Veterinary Anatomy, Federal University of Agriculture, Makurdi &
University of Ibadan, and Department of Anatomy, University of Ilorin,
for releasing these fragile bones for our investigations. – The authors
declare no conflict of interests